refactor some stuff from SyncAdapter to own AbstractBase class to

improve writing of new SyncAdapter without rewrite same code.

Remember the DRY..

src/eu/alefzero/owncloud/syncadapter/AbstractOwnCloudSyncAdapter.java

@@ -0,0 +1,164 @@
+package eu.alefzero.owncloud.syncadapter;
+
+import java.io.IOException;
+import java.net.UnknownHostException;
+import java.util.Date;
+import java.util.LinkedList;
+
+import org.apache.http.HttpHost;
+import org.apache.http.HttpResponse;
+import org.apache.http.auth.AuthScope;
+import org.apache.http.auth.UsernamePasswordCredentials;
+import org.apache.http.client.ClientProtocolException;
+import org.apache.http.conn.ConnectionKeepAliveStrategy;
+import org.apache.http.impl.auth.BasicScheme;
+import org.apache.http.impl.client.DefaultHttpClient;
+import org.apache.http.protocol.BasicHttpContext;
+import org.apache.http.protocol.HttpContext;
+
+import android.accounts.Account;
+import android.accounts.AccountManager;
+import android.accounts.AuthenticatorException;
+import android.accounts.OperationCanceledException;
+import android.content.AbstractThreadedSyncAdapter;
+import android.content.ContentProviderClient;
+import android.content.Context;
+import android.net.Uri;
+import android.text.TextUtils;
+import eu.alefzero.owncloud.authenticator.AccountAuthenticator;
+import eu.alefzero.webdav.HttpPropFind;
+import eu.alefzero.webdav.TreeNode;
+import eu.alefzero.webdav.TreeNode.NodeProperty;
+import eu.alefzero.webdav.WebdavUtils;
+
+/**
+ * Base SyncAdapter for OwnCloud
+ * Designed to be subclassed for the concreete SyncAdapter, like ConcatsSync, CalendarSync, FileSync etc..
+ * 
+ * @author sassman
+ *
+ */
+public abstract class AbstractOwnCloudSyncAdapter extends AbstractThreadedSyncAdapter {
+
+	private AccountManager accountManager;
+	private Account account;
+	private ContentProviderClient contentProvider;
+	private Date lastUpdated;
+	
+	private DefaultHttpClient client = null;
+	private HttpHost host;
+
+	public AbstractOwnCloudSyncAdapter(Context context, boolean autoInitialize) {
+		super(context, autoInitialize);
+		this.setAccountManager(AccountManager.get(context));
+	}
+
+	public AccountManager getAccountManager() {
+		return accountManager;
+	}
+
+	public void setAccountManager(AccountManager accountManager) {
+		this.accountManager = accountManager;
+	}
+
+	public Account getAccount() {
+		return account;
+	}
+
+	public void setAccount(Account account) {
+		this.account = account;
+	}
+
+	public ContentProviderClient getContentProvider() {
+		return contentProvider;
+	}
+
+	public void setContentProvider(ContentProviderClient contentProvider) {
+		this.contentProvider = contentProvider;
+	}
+
+	public Date getLastUpdated() {
+		return lastUpdated;
+	}
+
+	public void setLastUpdated(Date lastUpdated) {
+		this.lastUpdated = lastUpdated;
+	}
+	
+	protected ConnectionKeepAliveStrategy getKeepAliveStrategy() {
+		return new ConnectionKeepAliveStrategy() {
+			public long getKeepAliveDuration(HttpResponse response, HttpContext context) {
+				// TODO: change keep alive straategy basing on response: ie forbidden/not found/etc
+				// should have keep alive 0
+				// default return: 5s
+				return 5 * 1000;
+			}
+		};
+	}
+	
+	protected HttpPropFind getBasicQuery() throws OperationCanceledException, AuthenticatorException, IOException {
+		HttpPropFind query = new HttpPropFind(getUri().toString());
+		query.setHeader("Content-type", "text/xml");
+		query.setHeader("User-Agent", "Android-ownCloud");
+		return query;
+	}
+	
+	protected TreeNode fireQuery(HttpPropFind query) throws ClientProtocolException, OperationCanceledException, AuthenticatorException, IOException {
+		BasicHttpContext httpContext = new BasicHttpContext();
+		BasicScheme basicAuth = new BasicScheme();
+		httpContext.setAttribute("preemptive-auth", basicAuth);
+		
+		HttpResponse response = getClient().execute(this.host, query, httpContext);
+		
+		TreeNode root = new TreeNode();
+		root.setProperty(TreeNode.NodeProperty.NAME, "/");
+		this.parseResponse(response, getUri(), getClient(), this.host, httpContext, root.getChildList());
+		return root;
+	}
+	
+	private Uri getUri() {
+		return Uri.parse(this.getAccountManager().getUserData(getAccount(), AccountAuthenticator.KEY_OC_URL));
+	}
+	
+	private DefaultHttpClient getClient() throws OperationCanceledException, AuthenticatorException, IOException {
+		if(this.client == null) {
+			String username = getAccount().name.split("@")[0];
+			String password = this.getAccountManager().blockingGetAuthToken(getAccount(), AccountAuthenticator.AUTH_TOKEN_TYPE, true);
+			if (this.getAccountManager().getUserData(getAccount(), AccountAuthenticator.KEY_OC_URL) == null) {
+				throw new UnknownHostException();
+			}
+			Uri uri = getUri();
+	
+			int port = (uri.getPort() == -1) ? 80 : uri.getPort();
+			this.client = new DefaultHttpClient();
+			this.client.getCredentialsProvider().setCredentials(
+				new AuthScope(uri.getHost(), port),
+				new UsernamePasswordCredentials(username, password)
+			);
+			this.client.setKeepAliveStrategy(this.getKeepAliveStrategy());
+			this.host = new HttpHost(uri.getHost(), port, (uri.getScheme() == "https") ? "https" : "http");
+		}
+		
+		return this.client;
+	}
+	
+	private void parseResponse(HttpResponse resp, Uri uri, DefaultHttpClient client, HttpHost targetHost, BasicHttpContext httpContext, LinkedList<TreeNode> insertList) throws IOException {
+		boolean skipFirst = true;
+		for (TreeNode n :WebdavUtils.parseResponseToNodes(resp.getEntity().getContent())) {
+			String path = n.stripPathFromFilename(uri.getPath());
+			if (skipFirst) {
+				skipFirst = false;
+				continue;
+			}
+			insertList.add(n);
+
+			if (!TextUtils.isEmpty(n.getProperty(NodeProperty.NAME)) &&
+					n.getProperty(NodeProperty.RESOURCE_TYPE).equals("DIR")) {
+				HttpPropFind method = new HttpPropFind(uri.getPath() + path + n.getProperty(NodeProperty.NAME).replace(" ", "%20") + "/");
+				HttpResponse response = client.execute(targetHost, method, httpContext);
+				parseResponse(response, uri, client, targetHost, httpContext, n.getChildList());
+			}
+		}
+	}
+	
+}